Arma 2: Operation Arrowhead
Arma 2: Operation Arrowhead is a war simulation shooter game developed by Bohemia Interactive Studio. Operation Arrowhead is a standalone project and does not require the original ARMA 2 game, however it can be integrated to ARMA 2 as well.
It's a military simulator like no other, assume any position you want in the US military and get into the battlefield. The game world is massive and consists of three interactive, destructible and incredibly large maps; expansive urban, desert and mountainous terrain.
The battling sides include multiple factions for each fighting side, with a collective amount of more than 300 new units, weapons and vehicles. The game features massive and extensive multiplayer mode where you can participate in battles of up to 50players, or partake new and immersive campaign missions in a cooperative mode!